I recently read an article CHECK constraints in SQl Server http://codingsight.com/check-constraints-in-sql-server/ . may be it could be helpful for you too

I know the only one alternative to ssms - dbforge studio for sql server. It also has free express edition. Code completion and source control are perfect. Take a look 

SQL Doc by RedGate is no doubt great tool. But have you considered other options? Two months ago my company bought dbForge Documenter for SQL Server. I think...